Crop protection

Biobest sticky traps available from Real IPM Kenya

Growers in Kenya, and throughout Africa, now have access to Biobest’s sticky cards and rolls via Real IPM Kenya. Acquired by Biobest in 2018, Real IPM Kenya has become the sole African distributor of this extensive range of cards and traps employed to monitor and trap pests worldwide. Blue or yellow?The sticky…

Weed control with TopControl

"A large surface can be covered with a relatively small volume"

Weed control in pot and container cultivation is a challenge for many growers. Due to the limited application possibilities of pesticides, a lot of time must be spent on weeding weeds and moss during cultivation and delivery work. Nowadays there are more and more different covering materials on the…

"Prevention is better than cure"

An apple a day, keeps the doctor away, goes the popular proverb. The wisdom behind prevention is better than cure has been around for a long time and suggests that we need to be more proactive than reactive in our daily diet. by Daniel Than This is no different in horticulture. We see this principle being used in Integrated Pest…

In North America, FloraLife delivers disinfectants to fight the coronavirus

The COVID-19 crisis reminds us of the importance of sanitation and disinfection in the workplace and beyond. FloraLife has TWO effective products to help you do that: FloraLife® D.C.D.® Cleaner and MicroBLOC® Disinfectant. Both meet EPA’s criteria for use against SARS-CoV-2, the novel coronavirus that…

The ‘inseparable bond’ between Hawaiian culture and native plants

The 17 goals agreed by the global community to reduce poverty and create a sustainable planet are the responsibility of all people, wherever they are in the world, according to the United Nations. The Sustainable Development Goals or SDGs represent a boundary-pushing blueprint for the future of the Earth…

Petunia yellowing: Lush light green growth

Vegetatively propagated petunias are considered heavy feeders, needing a higher nitrogen rate of 200 to 300 ppm. When fertility rates become excessive, lush growth can occur. by Brian E. Whipker - bwhipker@ncsu.edu  On a greenhouse visit, a group of petunia hanging baskets were observed with lush growth and…

New thrips identification poster available

Thrips are among the most important pests in greenhouse crops. The number of established thrips species in greenhouses has increased drastically over the last decade. Knowing which species of thrips is present in your greenhouse, is an important first step for setting up effective control programs.…

Advancing global food security through early disease detection

Indoor growing platform wins 250K prize

Radicle Growth has awarded Scanit Technologies $250,000 as the winner of the Radicle Challenge by Corteva. Radicle teamed up with Corteva on this Challenge to identify a…

How to reduce the risk of bacterial diseases in greenhouse horticulture

While plant pathogenic bacteria are small, they can cause major problems in the greenhouse cultivation of vegetables and ornamental plants. Implementation of hygiene protocols, as well as the disinfection of greenhouses before growing new crops, can prevent the spread of the bacteria. Unfortunately…

Scheme documents updated

Protecting nurseries and industry in New Zealand from biosecurity hazards

Work with nurseries through 2019’s pilot programme provided valuable feedback for improvements to the PPBS. These have been implemented, and major changes include: The Core Standard…

A story of plant protection: Ireland’s St. Patrick’s Day gift to President Trump

Plants can serve as a profound symbol of friendship, especially when they cross an ocean to help two nations strengthen their bonds. I witnessed this firsthand on March 9, when I visited the Irish Embassy in Washington, D.C., joining Irish Ambassador to the United States Daniel Mulhall as he received a…

US (MA): Season kick-off considerations, pavement ants

Mild temperatures and lack of snow cover during the second half of the winter have accelerated the pace of preparation and activities around greenhouse crop production. If the pattern stays as it is, it looks to be an early season. With that said, it is easy to get caught up in the hustle and bustle and…

US: EPA streamlines evaluation of pesticides under ESA

The U.S. Environmental Protection Agency (EPA) released its “Revised Method for National Level Listed Species Biological Evaluations of Conventional Pesticides.” This is an…

Chasing myrtle rust in New Zealand - the first year after invasion

A new paper has been published summarising the diagnostic activities undertaken during the myrtle rust response in New Zealand. After the first detection of Austropuccinia psidii in Kerikeri, a system was set up at the Ministry for Primary Industries to process the notifications. MPI’s Plant Health and…

Expecting the unexpected: Aphids and mites in geraniums

Years ago zonal geranium (Pelargonium x hortorum) was among the few crops I rarely saw in the Entomology Diagnostic Lab, aside from occasional fungus gnat damage to roots or stems. Foxglove aphid, despite its long history as a greenhouse pest, then started taking a liking to the crop where it usually…

Australian spotlight on Tomato spotted wilt virus

Tomato spotted wilt virus (TSWV) causes a range of symptoms, depending on the age of plants, weather conditions and nutritional status. Symptoms include yellow mottling of leaves, ringspots, chlorotic blotches and line/mosaic patterns. Wilting and purpling of leaves can occur and necrotic lesions can…

Is there still hope for rapid change from pesticides to IPM in Europe?

The third edition of the Foodlog ‘Agriculture without chemicals – How?’ congress was held at Koppert Biological Systems headquarters on 27 February. This year the congress focused on Plant Health, to coincide with the United Nations' International Year of Plant Health. The initial debate on the…

Greenhouse observations: Highlighting current disorders

Most e-GRO Alerts focus on a single disorder, pest, or disease. In this Alert, eight disorders that were observed during recent greenhouse visits are highlighted. by Brian E. Whipker - bwhipker@ncsu.edu Natural pest control on hydrangea (Photo: Brian Whipker, 2020) Southern blightSouthern blight (Sclerotiumrolfsii)…

US (CA): Native sweat bee shows potential as pollinator

Entomologists at UC Riverside have documented that a species of native sweat bee widespread throughout North and South America has a daily routine that makes it a promising pollinator. Because the bee can thrive in environments that have been highly modified by humans, such as cities and agricultural…

How quickly do flower strips in cities help the local bees?

Insects rely on a mix of floral resources for survival. Populations of bees, butterflies, and flies are currently rapidly decreasing due to the loss of flower-rich meadows. In order to deal with the widespread loss of fauna, the European Union supports “greening” measures, for example, the creation of…

Orchids are woven through Chinese culture - what happens if they vanish?

Unfurling across paintings, poems and carvings, Cymbidium orchids are more than just wild plants in China. They are inextricably linked with the country’s culture. But this…

Update and review: Powdery mildew on calibrachoa

We’ve seen quite a few cases of calibrachoa with powdery mildew this season. An e-Gro Alert was written on this topic in 2015 (http://www.e-gro.org/pdf/2015_436.pdf), but, since we’ve been seeing a number of samples this year, let’s review. by Nora Catlin - nora.catlin@cornell.edu Carefully inspect incoming…

Doug Barrow joins Bioworks as Biological Control Advisor

Doug Barrow has been named Biological Control Advisor at BioWorks. In his new position, Mr. Barrow will be increasing BioWorks ability to deliver personalized programs and support to customers in North America. Mr. Barrow has over 20 years of experience in the horticulture industry, with his most recent experience…

False Codling Moth in roses

False Codling Moth (FCM) is a quarantine pest that causes significant crop damage in roses. False Codling Moth (FCM) has led to some interceptions in the market, making growers unable to export their cut flowers translating into loses. FCM is a major pest, feeding on a wide range of rose varieties and lately it has been…

What do crop protection products and chrysanthemums have in common?

In the past few years, schools across the US have been battling an invasion of head lice. In 2017, over 100 children were found to have lice in Harrisburg, Pennsylvania, which the school district has called “unprecedented.” And in 2019 a school in Sheepshead Bay section of Brooklyn school reported an…

Diaporthe foeniculina causing yellowing and dieback on Ficus benjamina

Ficus benjamina, commonly called weeping fig or Benjamin fig, is a flowering plant in the family Moraceae. It is widely grown as an ornamental tree or hedge. During the spring of 2019, yellowing and dieback of F. benjamina were observed in different regions of Hamedan Province, Iran (Fig. 1). Figure 1:…

Research looks to beneficial insects for pest control

A Texas A&M AgriLife Extension Service entomologist is studying how a combination of beneficial insects can help control the pests in greenhouses. Erfan Vafaie, AgriLife Extension program specialist in Integrated Pest Management, Overton, just wrapped up the second year of a three-year study looking at…

Mealybug added to Altus label in Canada

Flowers Canada announces that mealybug has been recently added to the Altus Insecticide (flupyradifurone) label - for use of ornamentals for both drench and foliar spray…

GIA Plant Protection Officer appointed to New South Wales

Greenlife Industry Australia welcomes Emma De Landre as its new Plant Protection Officer. Based in Sydney, New South Wales, Emma’s role will operate across New South Wales and northern Victoria under the levy funded ‘National Nursery Industry Biosecurity Program’ (NY15004). With experience spanning 25…

Are your plants suffering from nutrient burn?

One common problem that many indoor growers run into is the leaves of their plant's browning, curling, and drying out around the edges. The most likely cause is nutrient burn.  While nutrient burn can sneak up on even the most experienced growers, it can be something to consider if you're new to fertigation.…

"Look for early symptoms and signs of plant diseases"

Current weather patterns of cloudy, overcast days can lead to an increase in disease problems such as Botrytis blight, Pythium root rot, powdery mildew, and downy mildew. Scout plants for early symptoms and signs of the pathogens. Quick action is needed to reduce crop losses. See these e-GRO Alerts for…

Strategic partnership brings botanical-oil-based fungicide-bactericide to U.S. market

Kemin Crop Technologies has announced a strategic partnership agreement with Laboratoire M2, a Canada-based technology and science company, to distribute Thymox Control, a thyme-oil-based biopesticide, effective immediately. Thymox Control is a broad-spectrum, contact fungicide-bactericide concentrate…

Latest on boxwood blight and new APHIS box tree moth action

Boxwood health check-up

The Horticultural Research Institute is invested in helping the industry understand the complex nature of boxwood health. New boxwood blight best management practices for landscape management were released last month in tandem with updated best management practices for production. HRI continues to guide research, monitor…

No silver bullet against boxwood blight yet, but work is being done

Last month the American Boxwood Society hosted its Third International Summit on Current Boxwood Challenges. Over 140 people attended to hear from researchers and growers from Europe, Canada and the United States to discuss the latest research on Boxwood Blight and the Boxwood Tree Moth. Hosted at the…

Control of aphids in rose

A reduction of available chemical agents to combat aphids in roses has made the integrated control of this pest more difficult. Choices need to be made about the remaining selective aphid control products which all have a negative impact on one or more beneficial insects, giving spider mite, whitefly and thrips more room to…

Oroganic insecticide/acaricide launched in the Netherlands

Oro Agri launched its new insecticide/acaricide Oroganic at HortiContact in Gorinchem, The Netherlands in February 2020. This plant protection product has recently been approved by the Dutch Board for the Authorisation of Plant Protection Products (CTGB) and is based on orange oil, an active substance of…

Verano365 launches first product at Biocontrols Conference

"Growers are seeing higher yields, shorter cycle times, lower unit costs and extended shelf-life"

Verano365, a startup horticultural technology company, announced its first product called Thrivedo at Biocontrols USA Conference held in Portland, Oregon. Thrivedo consists of a proprietary protein-surfactant that delivers a significant increase in nutrient efficiency, water uptake, and plant vigor.…

Northern Australia Biosecurity Training Program 2019

In 2019 a series of workshops were introduced to improve plant protection and biosecurity capabilities of production nurseries in Northern Australia. Workshops were organised by Greenlife Industry Australia (GIA) and the Northern Territory Government, with funding from the Australian Department of…

Shipping plants: Beware of quarantine pests and diseases

Greenhouse growers have a lot to juggle during the busy spring production season: crop scheduling, plant health, employee management, logistics, and ship dates. However, there…

AmericanHort welcomes USDA plant pest funding announcement

AmericanHort released a statement as USDA’s Animal and Plant Health Inspection Service (APHIS) announced projects funded under the Plant Pest and Disease Mitigation and Disaster Prevention Program. “The Plant Pest and Disease Mitigation and Disaster Prevention Program has a complicated name but adds…

Tulip virus X is tougher than expected

The Tulip virus X (TVX) can survive for no less than eight months in the soil. That's one of the results of the PPP 'Towards virus-free and sales-oriented cultivation'. Wageningen University & Research, Proeftuin Zwaagdijk and the BKD are researching viruses in tulips, lilies and hosta. The research…

Brazil to allow for automatic approval of new agrochemicals

Brazil’s Agriculture Ministry will allow for agrochemicals awaiting regulatory approval to receive licenses automatically, potentially allowing new products to reach market…

Gerben Messelink appointed as special professor of Entomology

The Executive Board of Wageningen University & Research has appointed Gerben Messelink as a Special Professor Biological Pest Control in greenhouse production systems. The special chair is housed in the chair group Entomology, led by Prof. Marcel Dicke. This special appointment is financed by Koppert…

New crop protection options for Canadian growers

Nealta Miticide (cyflumetofen) has been approved for use on greenhouse and outdoor ornamental crops in Canada. Nealta is an acaricide that is labelled for spruce spider mite, european red mite, two-spotted spider mite and McDaniel spider mite. Nealta is not known to harm many commonly used arthropod…

"Biological crop protection only has advantages"

Young Plants Grünewald in the Dutch town of ’s-Gravenzande specializes in the rooting of herb, potted and bedding plants. Under 3.6 hectares of glass, over 1500 varieties of young plants are propagated vegetatively. With a product range that size, it becomes a challenge to keep the starting material free…

Best management practices for boxwood health in the landscape

The Horticultural Research Institute (HRI) released a set of recommended best management practices (BMPs) aimed at dealing with boxwood blight in the landscape. The new BMPs came at the request of industry stakeholders following new findings from ongoing boxwood blight research. As boxwood blight…

Red Lands Roses hosts training on False Codling Moth (FCM)

Red Lands Roses hosted a peer to peer learning on False Codling Moth on 21st February 2020. Farm representatives during the session This session was aimed at equipping staff from all flower farms in and around Nairobi on the dreaded pest. Farm representatives engaged on the best practices in the fight…

Royal encouragement at Kew Gardens for biosecurity strategies

On Thursday 20 February, a Plant Health and Biosecurity Meeting was held at Kew Gardens. Those invited included growers, importers, NGOs and retailers, who throughout the day heard from HRH Prince of Wales, Lord Gardiner, Parliamentary Under Secretary of State for Rural Affairs and Biosecurity and Nicola…

Prince Charles 'anguished' by death of British trees from new pests and disease

The Prince of Wales has lamented the "appalling tragedy" of Britain’s lost trees, saying even native oaks are now a "deep cause for concern". The Prince, who spoke of his personal “anguish”, said the “new or increasing” threats of pests and disease are an “appalling tragedy for everyone who loves trees…

...Ciao and Shalom

Improving the feasibility of limonium for exports to distant destination markets

Limonium, a.k.a. Statice, Caspia, Sea Lavender, Misty, or Marsh-Rosemary, is one of the world’s 20 top-selling cut flowers, many of the  120 -150 varieties are endemic to the Mediterranean region. Symbolizing fond memories and sympathy, it is often part of memorial wreaths, bouquets and floral arrangements…

UF researchers link gene from ancient virus with plant stature

A new study from the University of Florida links the ability of plants to grow to great heights to a 500-million-year-old interaction between a virus and a type of algae. “The…

Niagara College Greenhouse Nursery cat officially named

Niagara College is introducing Scout, the new Niagara College Greenhouse Nursery cat. Over 1,800 name submissions were received. The name was chosen because Scout will be hunting for mice, as well as scouting out new students. Scout has his own Instagram account at…

HRI scholarship recipient to focus on ornamental plant research

The Horticultural Research Institute (HRI), the AmericanHort foundation, in conjunction with the Ohio Nursery and Landscape Association (ONLA) has named Ohio State University graduate student Coralie Farinas as its 2019-2020 Bryan A. Champion Memorial Scholarship recipient. The funds will help Coralie…

International journal highlights myrtle rust resistance research

Grant Smith, Plant and Food Principal Scientist/Program Leader has had an article published in American Phytopathological Society (APS) journal (Jan 2020) based on his…

'Rule breaking' plants may be climate change survivors

Plants that break some ecological rules by adapting to new environments in unconventional ways could have a higher chance of surviving the impacts of climate change, according to a new study from researchers at the University of Sydney, Trinity College Dublin and the University of Queensland. Professor…

Score real silver at Cindro at HortiContact:

"The effect of silver, that's golden"

For a number of years now, Cindro, producer of among other products the silver-stabilized hydrogen peroxide Oxyl-PRO®S, has been working hard to help growers prevent diseases and pests in their greenhouse. Also bio-stimulants contribute to healthy growth, including the latest in the Cindro product line: Sinergy® GrowShield. Photo: The silver plates are ready "We believe t…

US (MI): Greenhouse disease and insect management recommendations for 2020

Michigan State University Extension has updated their insect and disease management recommendations for the 2020 greenhouse season. There have been some changes from the previous 2019 recommendations. These recommendations are updated yearly to reflect efficacy of pesticides as MSU Extension specialists and…

Australia: Detection dogs track down rare orchid

Detection dogs Missy and Taz of OWAD Environment were brought in by NSW Government’s Saving our Species (SoS) program and the National Parks and Wildlife Service (NPWS) after staff spent fruitless days searching for new orchid populations. Discovered by a member of the public, the orchid is being…

Foliar nematode: Angular leaf spots can be confusing to diagnose

Angular (vein-delimited) leaf spots on ornamental plants are often attributed to bacterial pathogens. However, multiple different pathogens can cause similar-looking leaf spots including fungi, downy mildews, and foliar nematodes. Diagnosis can sometimes be confusing (see Figures 6, 7, and 8). This was…

Koppert collaborates to launch free biocontrol tool

The CABI* BioProtection Portal – an online resource to raise awareness of biological crop protection options for growers – has been launched in Kenya. Koppert Biological Systems is one of the partners to share its expertise to produce an innovative free-to-use tool to help growers reduce their reliance…

Southwest Michigan floriculture report – February insect update

It’s unusual to find the Florida fern caterpillar in Michigan, especially in February, but that’s what several southwest Michigan growers have found in their Boston ferns. As a group, caterpillars are barely an afterthought in spring floriculture crops. It’s rare to find them and even when we do, they…

Jürgen Brokelman appointed as Commercial Manager at HortiPro

HortiPro has developed in recent years as a producer and distributor of biological and natural plant protection products in the European market. Due to the strong growth of the company, the management of HortiPro has decided to strengthen itself with Jürgen Brokelman, who will take up his new task on 1…

How digital pest and disease mapping can boost flower output

Mapping of pests and diseases in horticulture is still often a manual, inaccurate and inefficient process relying on paper-based analysis and individual knowledge. Farms use a team of scouts to collect data on many hectares of greenhouses and measure the effectiveness of pesticide spraying. Using these…

KoppertWednesday event

Partners with nature; a marriage or living apart together?

What's the partnership we have with nature – is it a marriage or are we better off living apart together? That was the question put to the panel during KoppertWednesday, the event organized by Koppert Biological Systems during the Fruit Logistica week. The moderator, Maren Schoormans, gave the floor to…

US: House passes SAF-backed measure to hire more ag inspectors

The House of Representatives passed a bill Monday that will add hundreds of new agriculture inspectors to U.S. ports of entry. Earlier this month, the Society of American Florists signed a letter of support for the bill, seeing it as a way to strengthen the scrutiny of pests and diseases at those ports…

See how drones will fly through your greenhouse

Last week PATS released their official demo video at the ‘Fruitnet World of Fresh Ideas’ prior to the start of the Fruit Logistica 2020 exhibition. The video shows more about their solution and how this helps growers to tackle difficult pests. For more information:PATS+31 (0)6 330 876 50info@pats-drones.compats-drones.com 

March 12, West Olive

US (MI): Winter nursery meeting to cover emerging issues

Michigan State University Extension will be offering the 2020 Winter Nursery Meeting for nursery and tree growers on March 12 at the Ottawa County MSU Extension Office, 12220…

Nosema maddoxi is an entomopathogen infecting Halyomorpha halys in the US

In 2017, Nosema maddoxi (Microsporidia: Nosematidae) was described as a pathogen of the brown marmorated stink bug, Halyomorpha halys (Hemiptera: Pentatomidae). Nosema maddoxi is a microsporidian infecting H. halys. Microsporidia are intracellular, obligate fungal parasites that usually cause chronic infections…

Certis USA announces CEO transition

Certis USA announced that President and CEO, Jow-Lih Su, PhD will transition his duties this year after nearly 20 years building Certis USA into one of the world’s leading…

@QueensFlowers

The Queen's Flowers

Mondays are better with flowers! #MondayMotivation pic.twitter.com/S8K4w8msPk — The Queen's Flowers (@QueensFlowers) February 10, 2020  

Thursday is Bug Day at Peace Tree Farm

Thursday is bug day at Peace Tree. "It’s the day that our Biocontrol team crisscrosses our greenhouses to replenish and maintain our army of beneficial insects", the grower explains. "They distribute sachets, release predators and parasites, and utilize our custom Bugzooka to launch and evenly spread…

Groundnut bud necrosis virus infecting anthurium in India

Anthurium, belonging to the Araceae family is a crop of commercial importance in India and many other countries. It is cultivated for its beautiful cut flowers, cut foliage and as a potted plant. In 2016, anthurium grown in greenhouses on the RHREC campus, GKVK Bengaluru, Karnataka, India, showed various…

Bumblebees carry heavy loads in economy mode

Bumblebees are the big lifters of the insect world, able to fly back to the hive with almost their own body weight in nectar on board. A study published Feb. 5 in Science Advances shows how they do it — and that bees can show more flexibility in behavior than you might expect from a bumbling insect.  “They…

Post harvest handling of cut flowers

Cut flowers are highly perishable compared to other horticultural or agricultural produce making post-harvest losses on flowers significant compared to other produce. The nature and extent of post-harvest loss is typical for each variety. Dealing with export of fresh cut flowers and especially to long…

Kemin Crop Technologies names Vince Livengood Regional Sales Manager

Kemin Crop Technologies, the Kemin Industries business unit focused on providing crop protection and crop health solutions for commercial greenhouses and specialty crops, has announced that Vince Livengood, who previously served as Technical Services Manager for Kemin Crop Technologies, has been named…

Australia looks to alternative pollinators to support apiarists and industry

As the bushfire crisis across Australia continues, so too does the threat to wildlife including bees which are crucial for successful pollination. Early assessment has indicated that more than 10,000 honey bee hives have been destroyed across the Australian mainland and around 800 hives and 115 nucleus…

Kenya: Regional Flower Growers & Exporters Forum

The Regional Flower Growers & Exporters forum has seen Fresh Produce Exporters Association of Kenya (FPEAK) and Kenya Flower Council (KFC) tour various counties in order to sensitize on the implications of False Coddling Moth on Roses as a hindrance to continued market access. So far, the forum has taken…

UF launches new online graduate certificate program addressing nuisance plants

As a youngster growing up in Buffalo, New York, Mike Sowinski wanted to work with bald eagles. Through his college biology and fisheries management courses, he became interested in what the birds eat – fish. Sowinski established a decade-long career with the Florida Fish and Wildlife Conservation…

Research into preventing Bemisia tabaci

Glastuinbouw Nederland and over 50 poinsettia growers concluded the 2019 poinsettia season with a crop event on 16 January. As has become traditional, they visited the lifespan test in the Royal FloraHolland lifespan testing room. The rest of the programme took place at World Horti Center, where Arthur…

Identification and management of liverwort in greenhouses

Liverwort is one of the major weeds in greenhouse and nursery production. Historically, liverwort has been reported as weed problem in cooler regions of the the United States including the Northeast and Pacific Northwest. It is primarily a problem in herbaceous perennials, woody ornamentals, or those…

Luxembourg becomes the first EU country to ban glyphosate

Luxembourg will be the first EU country to ban glyphosate starting February. The veto on this pesticide suspected of causing cancer will have three stages and will be…

Joop van Lenteren (WUR) delved into the present and past in new book

"Use of biological fighters on large scale in South America and the Caribbean surprising"

The fact that there are efficient natural enemies for pest control in South America gives hope for biological control options in Europe, should the pests settle here, says professor Joop van Lenteren from Wageningen University & Research. Together with three colleagues from Latin America, he published a book about biological pest control in South America and the Ca…

Pedestal Insect Growth Regulator gets California registration

OHP announced the California state registration of Pedestal Insect Growth Regulator. Pedestal is now available for sale through authorized OHP distributors in California as well as in other states. Pedestal, with the active ingredient novaluron, is a suspension concentrate formulation labeled for use on ornamentals…

2020 UK Pesticide Guide available

The 2020 BCPC UK Pesticide Guide, with the latest information for those involved in pesticide use and application, is now available to buy in print form. The ‘Green Book’, and its online equivalent at ukpesticideguide.co.uk, is a reference for a wide range of audiences involved in pesticide use and recommendation. It covers all pesticide products…

The double scourge of powdery mildew

Mention “powdery mildew” to a cannabis grower and they turn white. Mention the same words to a floriculture grower and all they can think of is how much pesticide spraying they’ll have to do to eliminate the pathogen. by Carl Silverberg For many growers, the big expense isn’t the cost of the pesticides or dumping…

US (VA): Pest Management Guide - Horticultural and Forest Crops, 2019

The 2019 Pest Management Guides are available in PDF format and are divided into three volumes: Field Crops (456-016), Horticultural and Forest Crops (456-017), and Home…

Australian industry gets involved in International Year of Plant Health

The United Nations has declared 2020 ‘International Year of Plant Health. Led by the global UN Food and Agriculture Organisation, the aim is to highlight the importance of protecting plants and is putting a spotlight on biosecurity. With plant industries contributing over $30 billion annually, the…

Map outlines most endangered plants of the U.S.

A recent study estimates that the number of plants that have disappeared since 1750 is double that of all birds, mammals, and amphibians combined. Sadly, not many people seem to be aware of that. To raise awareness, a team of researchers and artists collaborated to celebrate the fragile existence of…

Iran: Phyllosticta capitalensis causing leaf spots on ornamental Magnolia and Syringa

Magnolia grandiflora is a medicinal and horticultural plant species in the family Magnoliaceae which is native to North America (Li et al., 2013). Syringa reticulate is a tree in the family Oleaceae which is native to Japan (Green et al., 1995). During autumn 2017, leaf spots were observed on Magnolia grandiflora…

Biotalys and Chrysal announce collaboration

Evaluating the potential of biofungicide in ornamental crops

Biotalys, a Food and Crop protection company developing a new generation of protein-based biocontrols, announces a collaboration with Chrysal to protect flowers against fungal…

Calcium application method impacts botrytis blight severity on petunia flowers

Two application methods of calcium (Ca), fertigation and spray, were investigated regarding their effects on Botrytis blight on petunia ( Petunia × hybrida ) flowers. Plants were grown for 6 weeks with three nutrient solutions consisting of 0, 100, or 200 mg·L ⁻¹ Ca and weekly calcium chloride (CaCl 2 ) sprays…

Destructive swarm of desert locusts entering Kenya

After destroying horticultural lands in Ethiopia and Somalia, a destructive swarm of desert locusts have moved south to Kenya. Last week, they entered the country, and they're making their way south. Actions are being taken to control the situation, but the threat is not over, explains Martin Dyer, owner…

European Union will no longer permit sales of chlorpyrifos

The European Union has confirmed it will no longer permit sales of the widely used actives in insecticides chlorpyrifos and chlorpyrifos-methyl; after 31/01/2020. The move was…

"Native plants can flourish after bushfire, but there’s only so much they can take"

In a fire-blackened landscape, signs of life are everywhere. A riot of red and green leaves erupt from an otherwise dead-looking tree trunk, and the beginnings of wildflowers and grasses peek from the crunchy charcoal below. Much Australian flora has evolved to cope with fire, recovering by re-sprouting…

"Successful test results and proven technology against fungi"

Micothon has developed this chemical free application for combating fungi like mildew and botrytis in greenhouse crops. Multiple installations have been successfully implemented in 2019, thanks to a promising trial with the machine in the Dutch Wageningen University greenhouse, in which scientific…

How pest and disease mapping makes a difference to yield and cost control

Dr Lisbeth Riis, founder and CEO at Scarab Solutions, has explained how the cut flower industry can significantly benefit by replicating the principles of digital mapping of pests and diseases to the plants in their greenhouses. Pest and disease mapping in any environment has far-reaching effects. Thirty…

Are invasive patterns of non-native insects related to woody plants differing between Europe and China?

Forests are increasingly threatened worldwide by the establishment of non-native species arriving from other continents with globalization of trade and international travels. Researchers compiled comprehensive lists of non-native insects associated to woody plants in Europe and China to compare their…

New Zealand: Myrtle Rust and Kauri Dieback Strategic Science Advisory Groups to merge

The Myrtle Rust Strategic Science Advisory Group and the Kauri Dieback SSAG agreed to merge at a recent combined meeting to discuss the future of the two groups. The decision…

New broad-spectrum bactericide/fungicide protects wide variety of crops

BioSafe Systems released OxiDate 5.0, a peroxyacetic acid (PAA) based, broad spectrum liquid bactericide/fungicide registered to treat and control plant pathogens on a wide variety of crops. According to the company, OxiDate 5.0 ensures an increased ROI by delivering dependable results at a competitive…

UK: Dame Helen Mirren voices animation warning of ‘devastating’ plant disease

Dame Helen Mirren is backing efforts to keep deadly plant disease Xylella out of the UK by voicing an animation warning of the risks it poses. The bacterium Xylella fastidiosa can infect more than 500 species of plant, including garden favourites such as lavender, oleander, rosemary and flowering cherry.…

European Commission bans thiacloprid

The European Commission decided not to renew the approval of a neonicotinoid called thiacloprid, following scientific advice by EFSA (the European Food Safety Authority) that…

Impacts of myrtle rust in New Zealand since its arrival in 2017

Myrtle rust, caused by Austropuccinia psidii, is an invasive fungal disease that affects plants in the myrtle family, the Myrtaceae. Of the almost 6,000 Myrtaceae species worldwide about 480 are currently recorded as hosts, but the host range is considered to be expanding. Myrtle rust originated in South…

New Zealand: New long-term monitoring form for myrtle rust

A long-term monitoring form for myrtle rust has been developed and is available on www.myrtlerust.org.nz for surveillance in New Zealand. The form is designed to be used by a wide variety of groups who have some level of knowledge of myrtle rust symptoms and who will be monitoring symptoms on specific…

Ralstonia eradicated in the Netherlands

Eradication is confirmed of the first finding of Ralstonia solanacearum (race 1) in the Netherlands at glasshouse companies producing ornamental Rosa plants for planting for cut flower production. The first finding was triggered following symptoms observed by the grower. The identity of R. solanacearum…

American serpentine leafminer: A threat to all of horticulture

The American serpentine leafminer (Liriomyza trifolii) is a small fly belonging to the family Agromyzidae, that infects plants from 29 plant families including many ornamental, vegetable and legume crops. Though not yet present in Australia, Liriomyza trifolii poses a significant threat to our…


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